I need an opinion as to what the best engine would be for a GP Pitts. I would use either a 4 stroke of a gas engine. I want plenty of power but don't want to overpower and tear the airframe apart.

I know there have been many flown and I am very interested in what has worked well. Please tell me if you have an engine that you feel is ideal. I am not interested in a particularly cheep engine. I want one that is going to run well and provide enough power.

Thanks

:-)